Periodic Table of Chemical Elements
2019 is the International Year of the Periodic Table of Chemical Elements (IYPT 2019)! Let's celebrate!
This year marks the 150th anniversary of the publication of Mendeleev’s Periodic Table of Chemical Elements in 1869.
In celebration, the United Nations Educational, Scientific, and Cultural Organization (UNESCO) officially proclaimed 2019 as “The United Nations International Year of The Periodic Table of Chemical Elements,” or "IYPT 2019."
Join us as we celebrate throughout the year by showing how chemical elements are central to "linking cultural, economic and political aspects of the global society through a common language, whilst also celebrating the genesis and development of the periodic table over the last 150 years."
Periodic Table Merchandise
The chemical elements face off. Vote and campaign for your favorites today!
Host your Own Contest
Use periodic table merchandise as prizes for creative uses of the periodic table, poem contests, art contests, and more.
Plan Technical Programming
Talk about the ongoing evolution of the periodic table and the importance of various elements with your ACS Student Chapter, Local Section, International Chemical Sciences Chapter, or other group.
See what other people are doing around the world. Tell us what you’re doing to be featured here.
- Describing the periodic table using only the 1000 most frequently used words
- Nature: Can quantum ideas explain chemistry’s greatest icon?
- ScienceMag: A storied Russian lab is trying to push the periodic table past its limits—and uncover exotic new elements
- ChemistryWorld: Is this the world’s oldest classroom periodic table?
- Scientific American: Happy Sesquicentennial, Periodic Table!
- ScienceNews: How the periodic table went from a sketch to an enduring masterpiece
- Share your periodic table in everyday life with C&EN's "I Spy a Periodic Table" Photo Contest
- JSTOR: How far does the periodic table go?
- The first IYPT Event took place in India on January 2
- Choose an element and join the IUPAC periodic table challenge quiz!
Chemical Elements History Timeline
Did You Know?
In 1977 Henry A. Hill was the first African American president of the American Chemical Society and did extensive work with polymers. He was also dedicated to improving employer-employee relationships and is noted for his dedication to professionalism. An ACS award is named in his honor.